2 years ago

State the law of conservation of energy in your own words

Physics

1 answer:

tigry1 [53]2 years ago

7 0

Energy cannot be created or destroyed but it can be transfered from one form to another.

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Which bird on the wire, the one with a mass of 50g or the one with a mass of 60g, has the most potential energy?

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Answer:

one with 60g have the more potential

Explanation:

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2 years ago

Joe follows the procedure below to make a compass.

Anna [14]

The answer would be C.

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An electrical power plant manages to send 88% of the heat produced in the burning of fossil fuel into the water-to-steam convers

Naya [18.7K]

Answer:

Explanation:

Let the x represent the amount of heat generated from the fossil fuel.

88% of x = 0.88 x

0.88 x was used to convert water to steam.

heat carried by steam = 40% × 0.88 x = 0.352 x

efficiency of the heat -to- work conversion = work output / work input = 0.352 x / x = 0.352 × 100 = 35.2 % which is less than 40 %

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2 years ago

When a 25-kg crate is pushed across a frictionless horizontal floor with a force of 200 N, directed 20 below the horizontal, th

Fofino [41]

Answer:

Option E is correct 310N

Explanation:

Given that the force used to push the crate is F = 200N

The force directed 20° below the horizontal

Mass of crate is m = 25kg

Weight of the crate can be determine using

W = mg

g is gravitational constant =9.8m/s²

W = 25×9.8

W = 245 N

Check attachment. For free body diagram and better understanding

Using newton second law along the vertical axis since we want to find the normal force

ΣFy = m•ay

ay = 0, since the body is not moving in the vertical or y direction

N—W—F•Sin20 = 0

N = W+F•Sin20

N = 245+ 200Sin20

N = 245 + 68.4

N = 313.4 N

The normal force is approximately 310 N to the nearest ten

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2 years ago

Free point cuz i cewl like dat‍♀️‍♂️

DedPeter [7]

Yes thank u teehee

.................... x

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1 year ago

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